Electric contact plug



May 17, 1927. 1,628,683

E. C. PEINlN ELECTRIC CONTACT PLUG Filed Nov. 8. 1924 Emile clnnlsfiamPgnry INVENTION Patented May 17, 1927.

UNITED STATES PATENT OFFICE.

EMILE CHRISTIAN PENIN, OF JOINVILLE-LE-PONT, FRANCE, ASSIGNOR TO PATHECINEMA, ANCIENS ETABLISSEMENTS PATHE FRERES, OF PARIS, FRANCE.

ELECTRIC CONTACT PLUG.

Application. filed N'ovcmccr 8, 1924, Serial No. 748,563, and in FranceDecember '1, 1923.

For certain uses it may be necessary to connect to a given contactplucan electric lamp, or other device employing the current, and on theother hand an electric mo tor. This chiefly the use with installationsfor screen projection by the use of domestic or toy motion pictureapparatus in which an electric lamp con; itutes the source of light andan electric motor is used for acluating the cinematographVic mechanism.

The object of the present invention is to provide an electric contactplug; which may be interposed between the two elements of a ph andsocket device, known per se, and by means of which the current from asingle line may be supplied to two diiierent apparatus, and whichcomprises also an electric resistance for varying the current in one ofthe said apparatus. whereby, in case the latter apparatus is an electricmotor, its speed can be readily varied.

In the appended drawing which shows by way of example an embodiment ofthe said invention Fig. 1 is an elevation, with the outer wall of theplug broken away.

Fig. 2 is a horizontal section on the line A-A (Fig. 1).

Fig. 3 is an outer view of the plug interposed between the two elements,plug and socket, of a plug: and socket connection of the known typewhich is shown diagran'm'iat ically as pertaining to a toy motionpicture apparatus.

The construction illustrated in the drawing shows that the deviceaccording to the invention comprises two pins 1 and 2 and two sockets 3and -il-. ()n the other hand the motion picture apparatus is providedwith two pins 16 adapted to it in the sockets of the female part 15 of ausual plug and socket connection. The two pins 1 and 2 are also adaptedto lit in said part [5 while the pins to may be introduced into thesockets 3 and 4.

The pin l is electrically connected to the socket 3, and the pin :2 isconnected in like manner to the socket 4.

The electric current is supplied by the conducting wires connected tothe member 15, and 'nioceeds tlyiencc through the sockets 3 and 1- andthe pins it) to a lamp or other electric device, and through resistancesl1 and the wires 5 apparatus.

The wire 5 is connected by the screw 7 to the pin 1 and to the socket 3,whilst the wire (3 connected by the screw 8 to the coinluctingr rod 9 onwhich a slide 10 may be shifted; said slide is provided with a strip 10in contact with the studs 11 of the resistances 11,

The said resistances consist oi. coils of resistauce wir which areconnected to the respcctive studs 11. The last stud 13 is conuccted bythe screw 12 to the pin 2 and socket The stud 13 forms an insulatedcontact piece which serves to break the cur rent. A casing l i coversthe whole device.

and G to a motor or other The operation of the said device is asfollows:

If it is desired to supply an electric motor by a circuit upon which oneor more lamps, or a suitable apparatus, are already connected by meansof a plug and socket connection, the motor is connected. to the twoconductors 5 and G oi. the plug accordingto the invention, and the saidplug is mounted between the elements 15 and 16 of the said plug andsocket connection. For this pur pose the pins 16 of the plug and socketconnection are inserted respectively into the sockets 3-4t and the pins1 and 2 are inserted into the sockets of the part 15; it will beobserved that the circuit of the first apparatus (or lamp) connected tothe line is not broken, since the pins 1 and 2 are respec tivelyconnected to the sockets 3 and 4.

As concerns the circuit of the motor which connected to the wires 5 and6, this circuit is connected to the line at T and 12, the variableresistance ll being in series with the wire 6. The speed of the motorcan thus be regulated by moving the slide over the contact studs 11.

Obviously, the plug according to the invention may be used forconnecting to the supply circuit, other apparatus than electric motors.

Havingnow described my invention, what I claim as new and desire tosecure by Let ters Patent is:

1. An electric contact plug comprising an insulating base, two pins andtwo sockets mounted or. said base and adapted to cooperate with the pinsand sockets ot a usual plug and socket connection, each pin beingelectrically connected to one socket so as to 'in two sets, each o'lwhich coi'i'iprising one pin and one socket acondncting slide mounted onsaid base, an tUlljLlStftlJlQ resistance mounted on said base andelectrically connected by one of its ends with one of the setspin-socket and by its other end with d slide. and tro conducting: wires,one or which is electrically connected to said slide and the other iselectricall coni'ieci'ed to the other set Pill SOCiiGE.

2. in electric contact plug comprising an innilatintr base. two maintern'iinals and two liiiliii'fil terminals carried by said base, saidmain and branch terminals being respcctirelr adapted to cooperate withthe socket d the plug of a usual plug and socket connection and saidmain terminals being respectively connected with said branch terurinals,an insulating block carried by said base. resistance elements supportedby said biocl: and connected to one terminal of one at said groups ofterminals. a movable slide adapted to contact with said resistanceelewastes ments and two conducting wires respectively connected to theother terminal of said group and to said slide.

3. An electric contact plug comprising an insulating base, two mainterminals and two branch terminals carried by said base, said main andbranch terminals being respec tively adapted to cooperate with thesocket and the plug of a usual plug and socket connection and said mainterminals being; respectively connected with said branch terminals, aninsulating block carried by said base, resistance elements supported bysaid block and connected to one terminal oli one of said groups ofterminals, :1 cover for said block, a slot in said cover, a mo 'ableslide protruding through said slot and adapted to contact with saidresistance elements and two conducting wires respectively connected tothe other terminal of said group and to sa'l slide.

In testimony whereof I have signed my name to this specification.

EMILE CHRISTIAN PENIN.

